Hiruzen Sarutobi had never expected his movements to be leaked. Aside from Uchiha Yi and Utatane Koharu, hardly anyone knew he had left Konoha.
Hiruzen did not suspect Yi or Koharu. If Yi had wanted to move against him, he could simply have taken his place. With Yi's current strength, Hiruzen would have been powerless to resist.
As for Koharu, she had no reason to do it. Such an act would harm Konoha as a whole.
Shimura Danzō was the likeliest person to know his movements—and to reveal his whereabouts.
Root had originally been established as a training base for the Anbu. As Danzō's power grew, it broke away from them, though it still belonged to the Anbu in name.
Hiruzen had long known Danzō had planted people in the Anbu. He had done his best to avoid them, yet there were still Danzō's people among the Anbu he trusted.
Of course, Hiruzen knew those white creatures from before might have done it as well.
Their ability to hide had alarmed him. Danzō had said they had nothing to do with him, and Hiruzen had believed him at the time.
Now, though, Hiruzen once again suspected Danzō.
Did those creatures truly have nothing to do with him?
"Danzo!" Hiruzen glared at him as if to say, You betrayed Konoha!
Danzō's heart sank. Being surrounded by so many people was hardly pleasant.
With the First, the Second Hokage, and Kagami Uchiha under his control, he had thought himself invincible. No one could stop him from becoming Hokage.
He had never expected his teacher, Tobirama Senju, to break free of the Impure World Reincarnation Jutsu's control.
And that lunatic Uchiha Yi had even brought Mito Uzumaki here to fight the First. Did he not know how poor her health was?
He had